Land Rover Repair: Service engine light, engine friction, engine torque

Question
My Service Engine Light just came on today. Ran by my local Auto Zone for an OBDII analysis. The trouble code was P1884 MANUFACTURER CONTRL TRANSMISSION. What does this mean? THX, Daniel

Answer
There are more factory defect codes fits for the P1884 OBDII code.
These are:

P1884
* CAN message:
Engine friction invalid
No apparent effect.

P1884
* CAN message:
Throttle position invalid
Substitute throttle angle of 50% adopted. No
kickdown. Operates in economy modes only.

P1884
CAN message: Engine
temperature invalid
Substitute engine temperature derived from
other inputs. No apparent effect.

P1884
CAN message: Road
speed invalid
No apparent effect

P1884
* CAN message:
Engine torque invalid
Substitute engine torque of derived from other
inputs. May affect shift quality.

P1884
* CAN message:
Engine speed invalid
Maintains current gear in low range, limp
home mode in high range. Shift pressure to
maximum, harsh gear shifts/engagement.

P1884
CAN message: Engine
air intake temperature
invalid
No apparent effect. On Off

P1844
Altitude shift control
invalid
No reduced torque compensation, possible
reduction in performance/ driveability at
altitude or high ambient temperatures.